<template>
	<!-- icon_home.png -->

	<div class="bread">
		<img src="~@/assets/images/common/icon_home.png" class="icon-home" />
		<span class="split-txt">/</span>
		<el-breadcrumb class="app-breadcrumb" separator="/">
			<transition-group name="breadcrumb">
				<el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
					<span
						v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
						class="no-redirect"
					>
						{{ item.meta.title }}
					</span>
					<a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
				</el-breadcrumb-item>
			</transition-group>
		</el-breadcrumb>
	</div>
</template>

<script>
	import pathToRegexp from 'path-to-regexp'

	export default {
		data() {
			return {
				levelList: null
			}
		},
		watch: {
			$route(route) {
				// if you go to the redirect page, do not update the breadcrumbs
				if (route.path.startsWith('/redirect/')) {
					return
				}
				this.getBreadcrumb()
			}
		},
		created() {
			this.getBreadcrumb()
		},
		methods: {
			// getBreadcrumb() {
			//   // only show routes with meta.title
			//   let matched = this.$route.matched.filter(
			//     (item) => item.meta && item.meta.title
			//   );
			//   const first = matched[0];
			//   if (!this.isDashboard(first)) {
			//     matched = [{ path: "/dashboard", meta: { title: "欢迎页" } }].concat(
			//       matched
			//     );
			//   }

			//   this.levelList = matched.filter(
			//     (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false
			//   );
			// },
			getBreadcrumb() {
				// only show routes with meta.title
				const matched = this.$route.matched.filter(item => item.meta && item.meta.title)
				// const first = matched[0]
				// if (!this.isDashboard(first)) {
				//   matched = [{ path: '/dashboard', meta: { title: 'Dashboard' }}].concat(matched)
				// }
				const levelList = []
				matched.forEach((item, index) => {
					if (item.meta && item.meta.title && item.meta.breadcrumb !== false) {
						if (index == 0) {
							levelList.push(item)
						}
						if (index > 0) {
							if (matched[index - 1].meta.title != item.meta.title) {
								levelList.push(item)
							}
						}
					}
				})

				this.levelList = levelList
			},
			isDashboard(route) {
				const name = route && route.name
				if (!name) {
					return false
				}
				return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
			},
			pathCompile(path) {
				const { params } = this.$route
				var toPath = pathToRegexp.compile(path)
				return toPath(params)
			},
			handleLink(item) {
				const { redirect, path } = item
				if (redirect) {
					this.$router.push(redirect)
					return
				}
				this.$router.push(this.pathCompile(path))
			}
		}
	}
</script>

<style lang="scss" scoped>
	.bread {
		display: flex;
		align-items: center;
		height: 40px;
		line-height: 40px;
		// background-color: #f7f8fa;
		z-index: 10;
	}

	.icon-home {
		width: 16px;
		height: 16px;
		display: block;
	}

	.split-txt {
		color: #97a8be;
		margin: 0 0 0 6px;
		display: inline-block;
		font-weight: bold;
		font-size: 14px;
	}

	.app-breadcrumb.el-breadcrumb {
		display: inline-block;
		font-size: 14px;
		line-height: 50px;
		margin-left: 8px;

		.no-redirect {
			color: #000;
			cursor: text;
		}
	}

	::v-deep .el-breadcrumb__separator {
		color: #000;
	}

	.el-breadcrumb__inner.is-link:hover,
	.el-breadcrumb__inner a {
		color: #000;
	}

	.el-breadcrumb__inner.is-link:hover,
	.el-breadcrumb__inner a:hover {
		color: #000;
	}
</style>
